#img1 {
    float: right;
}

#para1 {
    color: red;
}

.class1 {
    background: green;
}

[my_attribute$=e123] {
    background: red;
}

[my_attribute^=my_] {
    color: aqua;
}

body {
    background-image: url("../img/bg.jpeg");
}

.div1 {
    width: 300px;
    border: 5px solid gray;
    padding: 20px;
    margin: 20px;
}

#header {
    background-color: orange;
    margin-bottom: 0;
}

#menu {
    background-color: yellow;
    height: 200px;
    width: 100px;
    float: left;
}

#content {
    background-color: gray;
    height: 200px;
    width: 400px;
    float: left;
}

#footer {
    background-color: orange;
    clear: both;
    text-align: center;
}